A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
What is the value of a? 9a  3(a  6)= 6 a=?
anonymous
 one year ago
What is the value of a? 9a  3(a  6)= 6 a=?

This Question is Closed

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1In this equation, you first need to simplify the expression and get rid of parentheses.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1You need to use the distributive property on the left side.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1dw:1443652798689:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1The first step in this equation is to simplify 3(a  6) using the distributive property

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1dw:1443652952295:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1I copied the 9a and the = 6 to the next line. We are only going to work on what is in the box. dw:1443653017673:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1dw:1443653089656:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1That was just applying the distributive property. Now we simplify 3(6) What is (3) * (6) = ?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Correct, since negative times negative is positive.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1dw:1443653260886:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1We simplified the parentheses. Now we need to combine like terms on the left side. We need to combine the 9a and 3a terms. What is 9a  3a = ?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1No. The exponent only changes when you multiply variables. Think of a as some unknown thing. It can be the number of books on a shelf, only you don't know it. If I ask you "there are 9 books and I took away 3 books, how many books are left?" What is the answer?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.19 books  3 books = 6 books 9 bananas  3 bananas = 6 bananas 9 shirts  3 shirts = 6 shirts 9a  3a = 6a

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1You must keep the "a". 9  3 = 6 (no numbers here have "a".) 9a  3a = 6a If you have 9 "a's" and you take away 3 "a's" you are left with 6 "a's"

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1dw:1443653672095:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Now we have an equation similar tot eh two we saw before. We need to undo the addition of 18 by subtracting 18 from both sides. dw:1443653770531:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Since nothing is being added to or subtracted from 6a, we just copy the 6a down. What is 18  18 ?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1dw:1443653854679:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Good. What is 6  18?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Correct. We have: dw:1443654066983:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1"a" is being multiplied by 6. We want "a" by itself on the left side. Now can you tell what we still need to do to get "a" by itself?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0subtract it by itself?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1a is being multiplied by 6. To undo a multiplication, you need to do the opposite operation. What is the opposite operation to a multiplication?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Correct. Since "a" is being multiplied by 6, you need to divide it by 6. Since we need to do the same to both sides of an equation, we divide both sides of the equation by 6.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1dw:1443654727026:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Correct & correct. We have: dw:1443655009021:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1The solution is a = 4

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thank You! I have 1 more :)
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.